Vulnerability-Lookup

GHSA-5FWH-QCFV-38CC

Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-01-23 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

arp: do not assume dev_hard_header() does not change skb->head

arp_create() is the only dev_hard_header() caller making assumption about skb->head being unchanged.

A recent commit broke this assumption.

Initialize @arp pointer after dev_hard_header() call.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-22988"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-23T16:15:54Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narp: do not assume dev_hard_header() does not change skb-\u003ehead\n\narp_create() is the only dev_hard_header() caller\nmaking assumption about skb-\u003ehead being unchanged.\n\nA recent commit broke this assumption.\n\nInitialize @arp pointer after dev_hard_header() call.",
  "id": "GHSA-5fwh-qcfv-38cc",
  "modified": "2026-01-23T18:31:29Z",
  "published": "2026-01-23T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22988"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/029935507d0af6553c45380fbf6feecf756fd226"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/393525dee5c39acff8d6705275d7fcaabcfb7f0a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70bddc16491ef4681f3569b3a2c80309a3edcdd1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/949647e7771a4a01963fe953a96d81fba7acecf3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c92510f5e3f82ba11c95991824a41e59a9c5ed81"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd6ccec088adff4bdf33e2b2dd102df20a7128fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e432dbff342b95fe44645f9a90fcf333c80f4b5e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-22988 (GCVE-0-2026-22988)

Vulnerability from cvelistv5 – Published: 2026-01-23 15:24 – Updated: 2026-01-23 15:24

Title

arp: do not assume dev_hard_header() does not change skb->head

Summary

In the Linux kernel, the following vulnerability has been resolved: arp: do not assume dev_hard_header() does not change skb->head arp_create() is the only dev_hard_header() caller making assumption about skb->head being unchanged. A recent commit broke this assumption. Initialize @arp pointer after dev_hard_header() call.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/e432dbff342b95fe4…
	https://git.kernel.org/stable/c/393525dee5c39acff…
	https://git.kernel.org/stable/c/70bddc16491ef4681…
	https://git.kernel.org/stable/c/029935507d0af6553…
	https://git.kernel.org/stable/c/dd6ccec088adff4bd…
	https://git.kernel.org/stable/c/949647e7771a4a019…
	https://git.kernel.org/stable/c/c92510f5e3f82ba11…

Impacted products

Vendor

Product

Version

Linux

Affected: 17e7386234f740f3e7d5e58a47b5847ea34c3bc2 , < e432dbff342b95fe44645f9a90fcf333c80f4b5e (git)
Affected: 41a1a3140aff295dee8063906f70a514548105e8 , < 393525dee5c39acff8d6705275d7fcaabcfb7f0a (git)
Affected: adee129db814474f2f81207bd182bf343832a52e , < 70bddc16491ef4681f3569b3a2c80309a3edcdd1 (git)
Affected: 1717357007db150c2d703f13f5695460e960f26c , < 029935507d0af6553c45380fbf6feecf756fd226 (git)
Affected: 5fe210533e3459197eabfdbf97327dacbdc04d60 , < dd6ccec088adff4bdf33e2b2dd102df20a7128fa (git)
Affected: 91a2b25be07ce1a7549ceebbe82017551d2eec92 , < 949647e7771a4a01963fe953a96d81fba7acecf3 (git)
Affected: db5b4e39c4e63700c68a7e65fc4e1f1375273476 , < c92510f5e3f82ba11c95991824a41e59a9c5ed81 (git)

Linux

Affected: 6.19-rc4
Unaffected: 0 , < 6.19-rc4 (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc5 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/arp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e432dbff342b95fe44645f9a90fcf333c80f4b5e",
              "status": "affected",
              "version": "17e7386234f740f3e7d5e58a47b5847ea34c3bc2",
              "versionType": "git"
            },
            {
              "lessThan": "393525dee5c39acff8d6705275d7fcaabcfb7f0a",
              "status": "affected",
              "version": "41a1a3140aff295dee8063906f70a514548105e8",
              "versionType": "git"
            },
            {
              "lessThan": "70bddc16491ef4681f3569b3a2c80309a3edcdd1",
              "status": "affected",
              "version": "adee129db814474f2f81207bd182bf343832a52e",
              "versionType": "git"
            },
            {
              "lessThan": "029935507d0af6553c45380fbf6feecf756fd226",
              "status": "affected",
              "version": "1717357007db150c2d703f13f5695460e960f26c",
              "versionType": "git"
            },
            {
              "lessThan": "dd6ccec088adff4bdf33e2b2dd102df20a7128fa",
              "status": "affected",
              "version": "5fe210533e3459197eabfdbf97327dacbdc04d60",
              "versionType": "git"
            },
            {
              "lessThan": "949647e7771a4a01963fe953a96d81fba7acecf3",
              "status": "affected",
              "version": "91a2b25be07ce1a7549ceebbe82017551d2eec92",
              "versionType": "git"
            },
            {
              "lessThan": "c92510f5e3f82ba11c95991824a41e59a9c5ed81",
              "status": "affected",
              "version": "db5b4e39c4e63700c68a7e65fc4e1f1375273476",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/arp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19-rc4"
            },
            {
              "lessThan": "6.19-rc4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.161",
                  "versionStartIncluding": "6.1.160",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "6.6.120",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.66",
                  "versionStartIncluding": "6.12.64",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.18.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc5",
                  "versionStartIncluding": "6.19-rc4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narp: do not assume dev_hard_header() does not change skb-\u003ehead\n\narp_create() is the only dev_hard_header() caller\nmaking assumption about skb-\u003ehead being unchanged.\n\nA recent commit broke this assumption.\n\nInitialize @arp pointer after dev_hard_header() call."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-23T15:24:09.756Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e432dbff342b95fe44645f9a90fcf333c80f4b5e"
        },
        {
          "url": "https://git.kernel.org/stable/c/393525dee5c39acff8d6705275d7fcaabcfb7f0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/70bddc16491ef4681f3569b3a2c80309a3edcdd1"
        },
        {
          "url": "https://git.kernel.org/stable/c/029935507d0af6553c45380fbf6feecf756fd226"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd6ccec088adff4bdf33e2b2dd102df20a7128fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/949647e7771a4a01963fe953a96d81fba7acecf3"
        },
        {
          "url": "https://git.kernel.org/stable/c/c92510f5e3f82ba11c95991824a41e59a9c5ed81"
        }
      ],
      "title": "arp: do not assume dev_hard_header() does not change skb-\u003ehead",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22988",
    "datePublished": "2026-01-23T15:24:09.756Z",
    "dateReserved": "2026-01-13T15:37:45.937Z",
    "dateUpdated": "2026-01-23T15:24:09.756Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-5FWH-QCFV-38CC

CVE-2026-22988 (GCVE-0-2026-22988)

Tags

Sightings

Nomenclature